SBI4U: Respiration and Photosynthesis Test. [25 marks]
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1 Part 1: Multiple Choice SBI4U: Respiration and Photosynthesis Test Mr. Dykstra Name: [25 marks] 1. Which of the following molecules links glucose oxidation, fatty acid catabolism, and the catabolism of some amino acids to the Kreb s cycle? A. glucose-6-phosphate B. oxaloacetic acid C. acetyl CoA D. pyruvic acid 2. Which of the following pathways is aerobic? A. fermentation B. electron transport system C. lactic acid formation D. glycolysis 3. Anaerobic respiration or fermentation does NOT: A. produce alcohol B. breakdown sugar in the absence of oxygen C. occur in the presence of oxygen D. energy-production by bacteria and yeasts 4. If anaerobic conditions continue in animal tissue following glycolysis, which one of the following substances will be produced? A. lactose B. lactic acid C. alcohol D. pyruvate 5. Which process would yield the greatest amount of energy in animal cell respiration? A. glycolysis B. fermentation C. electron transport chain D. Calvin cycle 6. Oxidative phosphorylation occurs: A. at the end of the respiratory chain. B. in and between cytochromes. C. using a H+ concentration gradient D. all of the above are correct 7. The largest single source of energy resulting from the oxidation of one molecule of glucose comes from: A. NADH produced in the Kreb's cycle. B. ATP directly produced in Kreb's cycle. C. ATP directly produced in glycolysis. D. NADH produced in glycolysis. / 67
2 8. Two electron carriers that are important in cellular respiration are: A. NAD+ and FAD. B. FAD and pyruvic acid. C. NAD+ and ATP. D. ADP and CoA. 9. The inner membrane of mitochondria: A. contain molecules of the electron transport system. B. contain ATP-ase. C. are impermeable to H+ ions. D. all of the above. 10. The final electron acceptor in cellular respiration is: A. NAD+. B. water. C. cytochromes. D. oxygen. 11. The molecular oxygen that we breathe in is found in which product of cellular respiration? A. lactate B. water C. carbon dioxide D. pyruvate 12. Glycolysis occurs in the: A. cytoplasm B. mitochondrial membrane C. mitochondrial matrix D. endoplasmic reticulum 13. The first product formed when acetyl CoA enters the Kreb's cycle is the -carbon compound. A. three; pyruvic acid. B. four; oxaloacetate C. four; succinate D. six; citrate 14. Which of the following substances is required in the Kreb's cycle reactions as an electron acceptor? A. FAD B. ADP C. coenzyme A D. oxygen 15. ATP is the energy molecule in cells because A. it is big. B. it carries a charge. C. it contains high-energy phosphate bonds. D. it is made of glucose.
3 16. Chlorophyll a and b absorb: A. green light B. blue and red light C. blue and green light D. the shortest wavelengths of light 17. Which one of the following can be a limiting factor in photosynthesis? A. O 2. B. Glucose. C. NADPH D. CO Which one of the following is produced in the non-cyclic pathway? A. CO 2. B. ADP. C. NADPH D. C 6 H 12 O Oxygen given off by green plants results from the breakdown of A. air. B. water. C. glucose. D. carbon dioxide. 20. One difference between the cyclic and non-cyclic pathways is: A. ATP is produced by one but not the other. B. only one involves chlorophyll. C. non cyclic requires a continual supply of electrons. D. only one requires light 21. Which of these best describes the use of light in photosynthesis? A. It splits ribulose biphosphate into two PGA's B. It excites the electrons that leave chlorophyl molecules C. It causes the carbon dioxide to combine with hydrogen atoms D. It produces NADPH 22. The Calvin cycle is dependent on the light reaction for a supply of: A. NADPH and ATP B. CO 2 C. O 2 D. H 2 O and ADP 23. The Calvin cycle reactions in photosynthesis produce A. CO 2. B. ATP C. oxygen. D. G3P
4 24. A lowered concentration of environmental carbon dioxide would affect a plant by: A. raising its rate of cellular respiration. B. lowering its rate of cellular respiration. C. raising its rate of photosynthesis D. lowering its rate of photosynthesis 25. A person who has a high level of aerobic fitness would have: A. a high VO 2 max B. a low VO 2 max C. a low lactic acid threshold D. both a low VO 2 max and low lactic acid threshold
5 Part 2: Labelling [17 marks] Fill in the indicated blanks on the diagram below: Cytoplasm [5 marks] Aerobic Respiration 2 ATP Glucose [C 6 ] 2 PGAL [C 3 ] 2 NADH 2 + 2CO 2 Plants Animals 2 NADH Citric Acid [C 6 ] Ethanol [C 2 ] + CO FADH 2 2CO 2 NET ENERGY GAIN: 2ATP Anaerobic Respiration: ATP Aerobic Respiration: Yields ATP Yields 4 ATP ATP H + / e - ATP ATP Water ATP e - blood atmosphere
6 Use the letters to label the following terms on the diagrams below: [12 marks] A) acetyl-coa B) photons C) FADH 2 D) photosystem II E) α-ketoglutarate F) both CO 2 G) Z enzyme H) ATPase I) thylakoid space J) all 3 NADH K) oxaloacetate L) the cytochromes Kreb's Cycle
7 Part 3: Short Answer [25 marks] 1). Aerobic respiration has the overall formula C 6 H 12 O 6 + 6O 2 --> 6H 2 O + 6CO 2 + energy. a) Where is the carbon dioxide produced? [1] b) What is the role of the oxygen? [1] c) How much net energy is produced for each glucose? [1] d) Approximately what % is this of the total energy contained in glucose? [1] 2). Describe the meaning of the term chemiosmosis and its role in the production of energy for the cell. [3] 3). Cellular respiration is controlled by feedback loops. Explain what this means, using an example. [2] 4). Rubisco is the most common protein in the world. a) What does it do? [2] b) How many reactions must it be involved in for the plant to gain one useful G3P? [1] c) What happens to all the G3P that is produced? [2] 5). A plant uses 54 ATP to build one glucose molecule, but only gets 36 ATP when it breaks the sugar down for energy. Why doesn't the plant run into an energy shortage? [3] 6). Photorespiration can be a problem for C3 plants (most plants). a) Explain why it is a bigger problem for C3 plants than for C4 and CAM plants. [2] b) What role does temperature play in this? [1] 7). List 3 ways that cellular respiration and photosynthesis are related. [3] 8). THINK: Cyanide poisoning occurs when cyanide blocks the transfer of electrons from cytochrome 5 to oxygen. What effects will this have on the cell? [2]
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